我想使用python将txt文件中的数据提取到csv文件

Question

I want to extract all the text files data into csv files and have to plot the graphs in python. I know how to read the file, lines , stripping out extra spaces in python but I don't know the logic to extract the data from input files to output file. I am attaching the images of input file structure, required output format csv file and also I am attaching my code. any suggestion to improve code is welcome. Thank you guys.

input.txt

# started on Thu Jan 23 21:03:30 2020

Performance counter stats for './a.out in_5K.fluid in_100K.fluid --verbose':

     13.677360      task-clock (msec)         #    0.987 CPUs utilized          
             0      context-switches          #    0.000 K/sec                  
             0      cpu-migrations            #    0.000 K/sec                  
         1,062      page-faults               #    0.078 M/sec                  
   5,86,68,441      cycles                    #    4.289 GHz                    
  17,13,37,074      instructions              #    2.92  insn per cycle         
   3,14,80,047      branches                  # 2301.617 M/sec                  
        26,042      branch-misses             #    0.08% of all branches        

   0.013853468 seconds time elapsed

required_output_format.csv

instructions,task-clock (msec),context-switches,cpu-migrations,page-faults,cycles,branches,branch-misses
171337074,13.677360,0,0,1062,58668441,31480047,26042

My code so far:

file = open("input.txt")
lines = file.readlines()

count = 1
for line in lines:
    line=line.strip()
    if(count>=6 and count <=13 ):
        words = line.split('#')
        data = words[0].strip().split(" ")
        value=""
        raw_value = data[0]
        values=raw_value.split(',')
        for i in values:
            value=value+i
        print(value.strip() )
        heading = data[-2]+data[-1]
        print(heading.strip())
    count += 1

Answer 1

If you have multiple files, the best thing would be to have a loop and use a csv writer.

import csv


#initialize an array with all the csv files you will write to

txtfiles = ['text1.csv' , 'text2.csv' , '....csv']
csvfiles = ['file1.csv' , 'file2.csv' , '....csv']

for file in txtfiles:
    with open( file , 'r') as in_file:
        stripped = (line.strip() for line in in_file)
        lines = (line.split(",") for line in stripped if line)

        #find the corresponding csv file you will write to 
        csvfile = csvfiles[textfiles.indexof(file)]

        with open(csvfile , 'w') as out_file:
                writer = csv.writer(out_file)
                #Input the header columns here
                writer.writerow(('header1' , 'header2' , '...'))
                writer.writerows(lines) #The lines is an array of lines that you have stripped

Hope this helps!

Answer 2

我认为您在绘制数据时遇到了问题，如果是这样，那么以 Pandas 数据框的形式导入您的 csv 文件，然后您可以在 python 中轻松绘制